142 lines
6.2 KiB
C
142 lines
6.2 KiB
C
/*
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* This file is subject to the terms of the GFX License. If a copy of
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* the license was not distributed with this file, you can obtain one at:
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*
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* http://ugfx.org/license.html
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*/
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/**
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* @file src/gdisp/gdisp_image_support.h
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* @brief GDISP image support routines header file.
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*
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* @defgroup Image Image
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* @ingroup GDISP
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* @{
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*/
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#ifndef _GDISP_IMAGE_SUPPORT_H
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#define _GDISP_IMAGE_SUPPORT_H
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/* Base endian handling routines */
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#define gdispImageGetVar(type, p, idx) (*(type *)(((uint8_t *)(p))+(idx)))
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#define gdispImageGetByte(type, p, idx, shift) (((type)gdispImageGetVar(uint8_t, p, idx))<<(shift))
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#define gdispImageSwap16(w) ((((uint16_t)(w))>>8)|(((uint16_t)(w))<<8))
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#define gdispImageSwap32(dw) ((((uint32_t)(w))>>24)|((((uint32_t)(w))&0x00FF0000)>>8)\
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|((((uint32_t)(w))&0x0000FF00)<<8)|(((uint32_t)(w))<<24))
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#define gdispImageSwapWords32(dw) ((((uint32_t)(w))>>16)|(((uint32_t)(w))<<16))
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#define gdispImageSwapBytes32(dw) (((((uint32_t)(w))&0xFF000000)>>8)|((((uint32_t)(w))&0x00FF0000)<<8)\
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|((((uint32_t)(w))&0x0000FF00)>>8)|(((uint32_t)(w))<<8))
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/*
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* Get a uint16_t/uint32_t from memory in the required endianness.
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* There is no alignment requirement.
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*/
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#if GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_LITTLE && GFX_CPU_NO_ALIGNMENT_FAULTS
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#define gidspImageGetLE16(p, idx) gdispImageGetVar(uint16_t, (p), (idx))
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#define gidspImageGetLE32(p, idx) gdispImageGetVar(uint32_t, (p), (idx))
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#else
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#define gdispImageGetLE16(p, idx) ( gdispImageGetByte(uint16_t, (p), (idx) , 0) | gdispImageGetByte(uint16_t, (p), (idx)+1, 8))
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#define gdispImageGetLE32(p, idx) ( gdispImageGetByte(uint32_t, (p), (idx) , 0) | gdispImageGetByte(uint32_t, (p), (idx)+1, 8)\
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|gdispImageGetByte(uint32_t, (p), (idx)+2, 16) | gdispImageGetByte(uint32_t, (p), (idx)+3, 24))
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#endif
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#if GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_BIG && GFX_CPU_NO_ALIGNMENT_FAULTS
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#define gidspImageGetBE16(p, idx) gdispImageGetVar(uint16_t, (p), (idx))
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#define gidspImageGetBE32(p, idx) gdispImageGetVar(uint32_t, (p), (idx))
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#else
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#define gdispImageGetBE16(p, idx) ( gdispImageGetByte(uint16_t, (p), (idx) , 8) | gdispImageGetByte(uint16_t, (p), (idx)+1, 0))
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#define gdispImageGetBE32(p, idx) ( gdispImageGetByte(uint32_t, (p), (idx) , 24) | gdispImageGetByte(uint32_t, (p), (idx)+1, 16)\
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|gdispImageGetByte(uint32_t, (p), (idx)+2, 8) | gdispImageGetByte(uint32_t, (p), (idx)+3, 0))
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#endif
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/*
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* Get a uint16_t/uint32_t from memory in the required endianness.
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* These are optimised routines but the memory must be word/dword aligned.
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*/
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#if GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_LITTLE
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#define gdispImageGetAlignedLE16(p, idx) gdispImageGetVar(uint16_t, (p), (idx))
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#define gdispImageGetAlignedBE16(p, idx) gidspImageGetBE16(p, (idx))
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#define gdispImageGetAlignedLE32(p, idx) gdispImageGetVar(uint32_t, (p), (idx))
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#define gdispImageGetAlignedBE32(p, idx) gidspImageGetBE32(p, (idx))
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#elif GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_BIG
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#define gdispImageGetAlignedLE16(p, idx) gidspImageGetLE16(p, (idx))
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#define gdispImageGetAlignedBE16(p, idx) gdispImageGetVar(uint16_t, (p), (idx))
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#define gdispImageGetAlignedLE32(p, idx) gidspImageGetLE32(p, (idx))
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#define gdispImageGetAlignedBE32(p, idx) gdispImageGetVar(uint32_t, (p), (idx))
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#else
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#define gdispImageGetAlignedLE16(p, idx) gidspImageGetLE16(p, (idx))
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#define gdispImageGetAlignedBE16(p, idx) gidspImageGetBE16(p, (idx))
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#define gdispImageGetAlignedLE32(p, idx) gidspImageGetLE32(p, (idx))
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#define gdispImageGetAlignedBE32(p, idx) gidspImageGetBE32(p, (idx))
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#endif
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/*
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* Change a uint16 or uint32 already in a register to the required endianness.
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*/
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#if GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_LITTLE
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#define gdispImageH16toLE16(w) (w)
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#define gdispImageH16toBE16(w) gdispImageSwap16(w)
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#define gdispImageH32toLE32(dw) (dw)
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#define gdispImageH32toBE32(dw) gdispImageSwap32(dw)
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#define gdispImageMakeLE16(w)
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#define gdispImageMakeBE16(w) { w = gdispImageH16toBE16(w); }
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#define gdispImageMakeLE32(dw)
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#define gdispImageMakeBE32(dw) { dw = gdispImageH32toBE32(dw); }
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#elif GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_BIG
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#define gdispImageH16toLE16(w) gdispImageSwap16(w)
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#define gdispImageH16toBE16(w) (w)
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#define gdispImageH32toLE32(dw) gdispImageSwap32(dw)
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#define gdispImageH32toBE32(dw) (dw)
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#define gdispImageMakeLE16(w) { w = gdispImageH16toLE16(w); }
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#define gdispImageMakeBE16(w)
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#define gdispImageMakeLE32(dw) { dw = gdispImageH32toLE32(dw); }
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#define gdispImageMakeBE32(dw)
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#elif GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_WBDWL
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#define gdispImageH16toLE16(w) gdispImageSwap16(w)
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#define gdispImageH16toBE16(w) (w)
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#define gdispImageH32toLE32(dw) gdispImageSwapBytes32(dw)
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#define gdispImageH32toBE32(dw) gdispImageSwapWords32(dw)
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#define gdispImageMakeLE16(w) { w = gdispImageH16toLE16(w); }
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#define gdispImageMakeBE16(w)
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#define gdispImageMakeLE32(dw) { dw = gdispImageH32toLE32(dw); }
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#define gdispImageMakeBE32(dw) { dw = gdispImageH32toBE32(dw); }
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#elif GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_WLDWB
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#define gdispImageH16toLE16(w) (w)
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#define gdispImageH16toBE16(w) gdispImageSwap16(w)
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#define gdispImageH32toLE32(dw) gdispImageSwapWords32(dw)
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#define gdispImageH32toBE32(dw) gdispImageSwapBytes32(dw)
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#define gdispImageMakeLE16(w)
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#define gdispImageMakeBE16(w) { w = gdispImageH16toBE16(w); }
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#define gdispImageMakeLE32(dw) { dw = gdispImageH32toLE32(dw); }
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#define gdispImageMakeBE32(dw) { dw = gdispImageH32toBE32(dw); }
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#else
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uint16_t gdispImageH16toLE16(uint16_t w);
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uint16_t gdispImageH16toBE16(uint16_t w);
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uint32_t gdispImageH32toLE32(uint32_t dw);
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uint32_t gdispImageH32toBE32(uint32_t dw);
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#define gdispImageMakeLE16(w) { w = gdispImageH16toLE16(w); }
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#define gdispImageMakeBE16(w) { w = gdispImageH16toBE16(w); }
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#define gdispImageMakeLE32(dw) { dw = gdispImageH32toLE32(dw); }
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#define gdispImageMakeBE32(dw) { dw = gdispImageH32toBE32(dw); }
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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void *gdispImageAlloc(gdispImage *img, size_t sz);
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void gdispImageFree(gdispImage *img, void *ptr, size_t sz);
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#if GFX_CPU_ENDIAN == GFX_CPU_ENDIAN_UNKNOWN
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extern const uint8_t gdispImageEndianArray[4];
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* _GDISP_IMAGE_SUPPORT_H */
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/** @} */
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